1). what are the building blocks of all proteins?
disaccharides
fatty acids
monosaccharides
amino acids
2). what is a polypeptide?
a long chain of linked amino acids
along chain of amine groups
a long chain of different r groups
the 20 different types of amino acids
3). which of the following is not a function of proteins?
provide support, structure, and storage
maintain homeostasis
defend organisms from disease
used as the primary source of energy in living organisms
carry important molecules through out the body
4). which of the following is a structural protein?
receptor proteins
actin and myosin
hemoglobin and antibodies
collagen and keratin
5). what is the cause of sickle cell anemia?
mosquitos
a change in one amino acid in the polypeptide chain which changes the shape of the red blood cell
a change in one amino acid in the protein chain which causes hemoglobin to not be able to carry oxygen correctly
a change in the sequence of amino acids in hemoglobin which causes few red blood cells to be made
6). what is essential to the function of a protein?
the types of r-groups
the number of amino acids
the amount of hydrogen
it's shape

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.